Is this facetious, or unintentionally so? Do you mean you need to replace one in-house staff with between 3 and 5 and presumably very expensive consultants?
Where do you think the customer is going to find that army of hyper competent experienced staff ideling around their premisess waiting for the day an SAP project drops?
One thing I've seen frequently is treating erp implementation as IT project. I'm a technical team member doing erp implementations for last 25 years (not sap) but I'll freely admit erp implementation is not about me or technology. It's primarily a business transformation project. You need those erp business process experts to guide and customize, AND you need thorough willingness to change your internal processes to fit the industry best practices you're buying. "successful erp project" empathically does not mean "installed it and it runs". It means thorough and detailed understanding of requirements, mapping to new processes, customization where absolutely positively necessary, substantial and organized and embraced business transformation, extensive training, and thorough testing including user acceptance testing.
If you think is erp as something you just install and life will be the same but magically better, you're gonna fail hard. Missed requirements and edge cases, and or significant internal resistance to change, are frequent challenges.
Also, because leading employees usually have no idea about the intricacies of the "old" system and think it's easily replaceable with a solution from the shelf.
We've been fed an off-the-shelf solution with modern tech like Angular and the like.
And even without the SAP burden the company is basically destroying our departament. I guess they don't care to lose us poor peasants but they're basically losing al know-how and one of the only two edges they have against competition.
I can't say I care too much at this point, but it's amazing how easy can companies destroy themselves for not caring about their employees.